Corkscrew



FIG. 1 is a left side view of a corkscrew in accordance with the new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view in a first open position thereof; and,

FIG. 6 is a right side view in a second open position thereof. 

The ornamental design for a corkscrew, as shown and described. 